<template>
<header >
    Header
</header>
</template>

<script setup >
 
</script>

<style scoped lang="less">
header{
    width: 100%;
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    border-bottom: 1px solid #ccc;
}
</style>